Audio Mixer Pins
Adds input channel strip for <source> to the audio mixer.
volume <source|caption> <dBFS>
Writes/reads the volume fader setting for channel strip with <source|caption>, which can be the name of the source or caption of any fader including master and monitor.
The following example sets the fader of the Microphone input to -30 dBFS.
apiwrite audio mixer 1, volume, microphone, -30